<template>
  <view>
    <view class="goods_item">
       <!-- 商品左侧信息区域 -->
      <view class="goods-item-left">
         <radio :checked= "goods.goods_state"  style="transform: scale(0.80) " color="#C00000" v-if = "showRadio" @click="radioClickHandler"></radio>
         <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
      </view>
      <!-- 商品右侧信息区域 -->
      <view class="goods-item-right">
        <view class="goods-name">{{goods.goods_name}}</view>
         <view class="goods-info-box">
          <!-- 商品价格 -->
             <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
              <!-- 商品数量 -->
             <uni-number-box class="num-box" :min="0"  v-if = 'showNum' @change="numChangeHandler"></uni-number-box>
        </view>
      </view>
      
    </view> 
  </view>
</template>

<script>
  export default {
    name:"my-goods",
    props:{
      goods:{
        type:Object,
        default:{}
      },
      //展示radio的值，默认不展示
      showRadio:{
        type:Boolean,
        default:false
      },
       // 是否展示价格右侧的 NumberBox 组件
    showNum: {
            type: Boolean,
            default: false,
          }
    },
    filters: {
      // 把数字处理为带两位小数点的数字
      tofixed(num) {
        return Number(num).toFixed(2)
      }
    },
    data() {
      return {
         defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    methods: {
      // radio 组件的点击事件处理函数
      radioClickHandler() {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 radio-change 事件，
        // 同时把商品的 Id 和 勾选状态 作为参数传递给 radio-change 事件处理函数
        this.$emit('radio-change', {
          // 商品的 Id
          goods_id: this.goods.goods_id,
          // 商品最新的勾选状态
          goods_state: !this.goods.goods_state
        })
      },
      // 商品的数量发生了变化
      numChangeHandler(val) {
          // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件
          this.$emit('num-change', {
            // 商品的 Id
            goods_id: this.goods.goods_id,
            // 商品的最新数量
            goods_count: +val
          })
        }
    }
  }
</script>

<style lang="scss">
  .goods_item{
     // 让 goods-item 项占满整个屏幕的宽度
       width: 750rpx;
       // 设置盒模型为 border-box
       box-sizing: border-box;
    display: flex;
   padding: 8px 5px;
     border-bottom: 1px solid #f0f0f0;
         // 左侧样式
    .goods-item-left{
     
      margin-right: 5px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      .goods-pic{
        width: 100px;
        height: 100px;
        display: block
      } 
    }
    // 右侧样式
    .goods-item-right{
      flex:1;
      padding:0px 5px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      .goods-name{
          font-size:12px;
          line-height:1.5;
        }
      .goods-info-box{
          display: flex;
          align-items: center;
          justify-content: space-between;

        .goods-price{
          color:#C00000;
          font-size:14px
        }
      }
    }
  }
</style>
